Bathtub



FIG. 1 is a front elevational view of a bathtub showing my new design;

FIG. 2 is a right side elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof;

FIG. 6 is a bottom plan view thereof;

FIG. 7 is a perspective view taken from the top, front and right sidethereof; and

FIG. 8 is a perspective view taken from the top, rear and right sidethereof.

The ornamental design for a bathtub, as shown and described.